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EM91403BP 参数 Datasheet PDF下载

EM91403BP图片预览
型号: EM91403BP
PDF下载: 下载PDF文件 查看货源
内容描述: 音频/脉冲可转换拨号与LCD接口和双音旋律发生器 [TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR]
分类和应用: 脉冲
文件页数/大小: 24 页 / 165 K
品牌: ELAN [ ELAN MICROELECTRONICS CORP ]
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EM91403 SERIES  
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE  
AND DUAL-TONE MELODY GENERATOR  
Operating flow chart  
HKS=Lo  
1
HF  
On-hook State  
HKS=Hi  
HF  
2
4
HKS=Lo  
On-hook  
Hand-free State  
Off-hook State  
HF  
3
HKS=Hi  
HD  
Off-hook  
HF  
HD  
HF  
Hand-free State  
HD  
HF  
6
5
HD  
HD  
On-hook  
Hold-line State  
Off-hook  
HKS=Hi  
Hold-line State  
HKS=Lo  
<Note> : HF = Handfree  
HD = Hold  
Truth table  
Operating state  
Input/Output pin level  
HKS  
PO  
F
F
XMUTE  
HFO  
L
L
H
HDO  
L
L
(0) On-hook, idle state  
(1) Off-hook line  
(2) Off-hook, HF line  
(3) On-hook, HF line  
(4) Off-hook, HD line  
(5) On-hook, HD line  
H
L
L
H
L
H
F
F
F
F
L
L
F
L
F
F
F
H
L
L
L
H
H
Note : F=floating (high impedance); H=logic “High”; L=logic “Low” level.  
Music on Hold  
EM91403 series built-in a melody generator to generate dual-tone music on DTMF output pin. The music is  
designed for telephone line at line holding.  
SDO (Serial Data Output) function  
The SDO is serial data output which format is same as UART protocol. SDO function is designed to drive LCD  
driver and voice synthesizer. So the dialing numbers can be display on LCD screen with EM32100 (or EM32116  
). The SDO signal consists of two start bits, six data bits and two stop bits. Each bit time is about 3.9 ms (256 Hz)  
and output sequences are following by start bits, data bits (LSB to MSB) and stop bits.  
* This specification are subject to be changed without notice.  
10.1.1997  
8